Saturday, February22, 2020
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Marine Weather and Tides
Seabrook, TX

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:52AMSunset 6:14PM Friday February 21, 2020 11:55 PM CST (05:55 UTC) Moonrise 5:53AMMoonset 4:36PM Illumination 2% Phase: Waning Crescent; Moon at 28 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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GMZ335 Expires:202002221615;;902144 Fzus54 Khgx 220338 Cwfhgx Coastal Waters Forecast National Weather Service Houston/galveston Tx 938 Pm Cst Fri Feb 21 2020 Upper Texas Coastal Waters From High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays Seas Are Provided As A Range Of The Average Height Of The Highest 1/3 Of The Waves...along With The Occasional Height Of The Average Highest 10 Percent Of The Waves. Gmz330-335-221615- Matagorda Bay-galveston Bay- 938 Pm Cst Fri Feb 21 2020
Rest of tonight..Northeast winds 5 to 10 knots. Bay waters smooth.
Saturday..East winds 5 to 10 knots becoming southeast 10 to 15 knots in the afternoon. Bay waters smooth becoming slightly choppy in the afternoon.
Saturday night..Southeast winds 10 to 15 knots decreasing to 5 to 10 knots after midnight. Bay waters slightly choppy becoming smooth after midnight.
Sunday..Southeast winds 10 to 15 knots. Bay waters slightly choppy.
Sunday night..Southeast winds 10 to 15 knots becoming south after midnight. Bay waters slightly choppy. A slight chance of showers after midnight. A chance of showers late.
Monday..Southwest winds 5 to 10 knots becoming west in the afternoon. Bay waters smooth. A chance of showers.
Monday night..North winds 5 to 10 knots becoming northeast after midnight. Bay waters smooth.
Tuesday..Northeast winds 5 to 10 knots becoming east in the afternoon. Bay waters smooth.
Tuesday night..North winds 15 to 20 knots. Bay waters choppy.
Wednesday..Northwest winds 15 to 20 knots. Bay waters choppy.
Wednesday night..North winds 15 to 20 knots decreasing to 10 to 15 knots after midnight. Bay waters choppy becoming slightly choppy after midnight.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 938 Pm Cst Fri Feb 21 2020
Synopsis for high island to matagorda ship channel out 60 nm.. High pressure over the mid-mississippi valley will bring lighter winds to the coastal waters overnight. A light onshore wind will return tomorrow and strengthen on Sunday. Another cold front will cross into the gulf waters Monday night. A second stronger cold front Tuesday night will likely require advisory flags for Wednesday.


7 Day Forecast for Marine Location Near Seabrook, TX
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location: 29.61, -94.98     debug


Area Discussion for - Houston/Galveston, TX
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FXUS64 KHGX 220523 AFDHGX

Area Forecast Discussion National Weather Service Houston/Galveston TX 1123 PM CST Fri Feb 21 2020

AVIATION. Some cirrus is moving overhead this evening but a mid level deck is developing int the wake of the cirrus over Central Texas. Models are not showing this developing with the exception of the NAM12 which brings in a BKN060 deck to KCLL by 12z. Am on the fence with this as short term guidance is not supporting much eastward movement. Will add a SCT group toward morning and watch trends. The overall trends include more cirrus on Saturday with VFR conditions. Winds will become E-SE and eventually just SE by the end of the day. A gradual lowering of ceilings is expected by the end of the day with a mix of MVFR/VFR ceilings developing between 03-09z. 43

PREV DISCUSSION. /ISSUED 343 PM CST Fri Feb 21 2020/

DISCUSSION . Mclear skies and diminishing winds should allow for fairly decent radiation cooling overnight. Though damp ground and some variable late night cirrus could be limiting factors, a brief light freeze still looks like a possibility generally north and east of a Liberty- Woodlands-Madisonville line.

A gradual warm-up is expected thru the weekend as high pressure continues to move away from the area and onshore winds resume. Cloud cover will be increasing from the west & southwest Saturday night and Sunday with perhaps a few isolated showers possible late in the day. The next front will push thru the region Monday morning and off the coast toward midday. Slightly better chances of rain can be expected ahead of the boundary as it moves through, although nothing particularly significant.

A reinforcing, stronger front will trek across the area Tuesday afternoon and evening. ECMWF is hanging onto the idea of some light precip with this front but it seems to be the outlier. One would think overall moisture availability will be on the low side similar to what the vast majority of other guidance depicts. Kept some isolated POPs in northeast parts of the CWA as a placeholder for now. Otherwise, colder and windy conditions are expected in the wake of this front into Wednesday. Remainder of the workweek looks mostly sunny and cool. 47

MARINE . Winds/seas are continuing to decrease this afternoon with high pres- sure settling over the region. Will be letting the SCEC for the bays and nearshore waters go at 3 PM . at 6 PM for the offshore waters as previously scheduled. Winds across the 20-60 nm waters have remained a bit elevated this afternoon, but should be decreasing by this eve- ning. Otherwise, not too many changes for the forecast for this week end as generally light/moderate onshore winds return to the area to- morrow. We are still expecting to see a couple of fronts move across the area in the coming days . with the first one by late Mon evening. This front should be a fairly weak one with only light/moderate N-NW winds developing in its wake. Shortly thereafter, a second, stronger cold front is progged to move off the coast Tues night. Strong north- erly winds are set to move into the Gulf waters Tues night/Wed morn- ing with Caution/Advisory flags possible starting at that time until Wed night. High pressure building down from the Plains will help de- crease wind speeds for the end of the week. 41

PRELIMINARY POINT TEMPS/POPS. College Station (CLL) 34 60 47 68 59 / 0 0 0 20 20 Houston (IAH) 35 60 48 67 61 / 0 0 0 10 20 Galveston (GLS) 44 59 54 67 63 / 0 0 0 10 10

HGX WATCHES/WARNINGS/ADVISORIES. TX . NONE. GM . NONE.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MGPT2 - 8770613 - Morgans Point, TX 5 mi62 min ENE 8.9 G 9.9 48°F 59°F1032.8 hPa
EPTT2 - 8771013 - Eagle Point, TX 10 mi62 min ENE 14 G 16 50°F 55°F1032.2 hPa
NCHT2 - 8770777 - Manchester, TX 17 mi62 min ENE 5.1 G 7 47°F 61°F1032.3 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 22 mi62 min NE 14 G 16 50°F 58°F1031.6 hPa
GRRT2 22 mi62 min E 14 G 16 50°F 55°F1032.4 hPa
GTOT2 23 mi62 min ENE 5.1 G 8.9 50°F 58°F1032.6 hPa
RLOT2 - 8770971 - Rollover Pass, TX 26 mi56 min ENE 12 G 13 48°F 52°F1033 hPa (+0.0)
HIST2 31 mi62 min NNE 4.1 G 5.1 42°F 57°F1032.7 hPa
KXIH 38 mi41 min NE 15 52°F 34°F
LUIT2 38 mi56 min NE 8.9 G 11 50°F 58°F1034 hPa (-0.3)
42035 - GALVESTON 22NM East of Galveston, TX 40 mi36 min 9.7 G 16 1033.3 hPa
FCGT2 - 8772447 - USCG Freeport, TX 49 mi56 min N 6 G 7 48°F 57°F1033.2 hPa (+0.0)
FPST2 49 mi62 min N 7 G 8 49°F 61°F1032.5 hPa

Wind History for Morgans Point, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Houston / Ellington, TX10 mi2.1 hrsNNE 510.00 miFair45°F32°F61%1033.2 hPa
Houston, Pearland Regional Airport, TX15 mi63 minN 010.00 miFair45°F33°F63%1033.2 hPa
Houston, Houston Hobby Airport, TX16 mi63 minENE 510.00 miA Few Clouds46°F30°F56%1033.1 hPa
Galveston, Scholes Field, TX24 mi64 minNE 1010.00 miFair49°F35°F59%1033 hPa

Link to 5 minute data for KEFD

Wind History from EFD (wind in knots)
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N9N9N10N10N7N5N4NE5NE5Calm
1 day agoN7N10N10--N10NW10N14N8N10N8N15--N16
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2 days agoN8NW9N8N9N8N7--NE9N8NE11NE10NE10NE6NE7NE9NE7NE7--N5N8N8N8N8NE7

Tide / Current Tables for Barbours Cut, Morgans Point, Galveston Bay, Texas
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Bolivar Roads, Texas Current
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Bolivar Roads
Click for Map
Sat -- 12:50 AM CST     -0.50 knots Max Ebb
Sat -- 02:31 AM CST     -0.43 knots Min Ebb
Sat -- 06:31 AM CST     Moonrise
Sat -- 06:52 AM CST     Sunrise
Sat -- 08:57 AM CST     -1.91 knots Max Ebb
Sat -- 01:15 PM CST     0.00 knots Slack
Sat -- 04:47 PM CST     1.88 knots Max Flood
Sat -- 05:31 PM CST     Moonset
Sat -- 06:13 PM CST     Sunset
Sat -- 10:50 PM CST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.4-0.5-0.4-0.4-0.6-0.9-1.3-1.6-1.8-1.9-1.8-1.5-1-0.20.71.41.81.91.71.41.10.70.3-0.1

Weather Map
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wmap_A
GEOS Local Image of SouthCentralPlains    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Houston/Galveston, TX (0,6,7,8)
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Ground Weather Radar Station Houston/Galveston, TX
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weather_mapweather_map weather_map

Gulf Stream Current


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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.